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fix weight decay for lion to be decoupled, using a switch

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This commit is contained in:
Phil Wang 2023-03-09 14:03:07 -08:00
parent ead570a43e
commit af03430992
1 changed files with 24 additions and 4 deletions
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28
csrc/kernels.cu
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@ -1328,8 +1328,19 @@ kOptimizerStatic8bit1State(T* p, T* const g, unsigned char* state1,
{
g_val = float(g_vals[j]);
g_val *= gnorm_scale;
if(weight_decay > 0.0f)
g_val += ((float)p_vals[j])*weight_decay;
if(weight_decay > 0.0f) {
switch(OPTIMIZER) {
case MOMENTUM:
case RMSPROP:
g_val += ((float)p_vals[j])*weight_decay;
break;
case LION:
p_vals[j] = ((float)p_vals[j])*(1.0f-lr*weight_decay);
break;
}
}
s1_vals[j] = smem_quantiles1[c1s[j]]*max1[0];
switch(OPTIMIZER)
@ -1677,8 +1688,17 @@ kOptimizerStatic8bit1StateBlockwise(T* p, T* __restrict__ const g, unsigned char
g_val *= gnorm_scale;
if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
{
if(weight_decay > 0.0f)
g_val += ((float)p_vals[j])*weight_decay;
if(weight_decay > 0.0f) {
switch(OPTIMIZER) {
case MOMENTUM:
case RMSPROP:
g_val += ((float)p_vals[j])*weight_decay;
break;
case LION:
p_vals[j] = ((float)p_vals[j])*(1.0f-lr*weight_decay);
break;
}
}
s1_vals[j] = smem_quantiles1[lane_id][c1s[j]]*absmax1[i/BLOCK_SIZE];